25 pounder shell

[Frank46]

If you wish to clean out the junk inside the case, get some Naval Jelly or phosphoric acid basically the same stuff. Clean out the heavier stuff. And you will need some chemical resistant gloves with long sleeves. Put some naval jelly on a Brillo pad and start scrubbing. Flush with water and if not the way you like it repeat. May not get all of the powder fouling and corrosion, but better than it was before cleaning. I have a bunch of shell casings from WW1 & WW2. Usually fix the dents with a large hunk of aluminum round stock and a dead blow hammer. Then using various grades of silicon carbide paper to get all the scratches out and down to good clean brass. Using my home made buffing setup start polishing with different types of buffing compound. Usually takes about 6 to 8 hours of buffing to get a nice polish. Did some 105mm shell casings for a couple vets in my area. Frank